need help i am dropping cheese onto fish and nothins happening!

where to put the cheese

once you've knocked the fish bowl over, the fish falls on to the scales. Move the cheese
next to the mouse hole (to tempt the mouse out for the cat to chase). Once the chase has
happened the cat will sit down under the trap. Pick up and move the cheese onto the same
side of the scales as the fish - this will weigh the right side down enough to push the
button that drops the trap.